<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            color: red;
        }

        /* 只需要写一个星号不需要命名 */
    </style>
</head>

<body>
    <div>我的</div>
    <div>我的</div>
    <div>我的</div>
    <ul>
        <li>nihao</li>
        <li>niyhao</li>
        <li>xiexie</li>
    </ul>
</body>

</html>